Reuben a



(No Model.)

R. A. MOHENRY.

STONE OR MARBLE DRILL.

No. 394,787. Patented Dec. 18, 1888.

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lJNiTEb STATES PATENT Orricn.

REUBEN A. MOHENRY, OF \VINFIELD, KANSAS, ASSIGNOR OF ONE-HALF TO ALBERT Ii. BLANKENMEISTER, OF SAME PLACE.

STONE OR MARBLE DRILL.

SPECIFICATION forming part of Letters Patent No. 394,787, dated December 18, 1888.

Application filed ay 14, 1888- Serial No. 278,826. (No model.)

To all whom it may concern.-

Be it known that I, REUBEN A. MCHENRY, of \Yinfield, in the countyof Cowley and State of Kansas, have inventcda certain new and useful Improvement in Stone and Marble Drills, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

to This invention relates to devices for the adjustment and clamping of marble and stone blocks and monuments while under the process of drilling and means for drilling the same; and the invention consists in features :5 of novelty hereinafter fully described, and

pointed out in the claims.

Figue I is an elevation of my drilling apparatus, and shows the adjustable frame, center-bearing rest, clamp-frame, and drill 2o drilling socket-holes in the die-section of a monument for seating the dowel-pins that secure it to its base. Fig. II is a horizontal section taken on line II II, Fig. I, and shows the action of the clamp-framein securing the 5 block or monument while under treatment. Fig. III is a horizontal section taken on line III III, Fig. I, and shows the longitudinally-adjustable bar that carries the drill; and Fig. IV is a detail of one of the side posts, and shows A the hook for fastening the clamp when said clamp raised in its inoperative position.

Referring to the drawings, in which similar figures of reference indicate like parts in all the views, 1 represents the side posts; 2, the

3 5 bottom bar; and 3, the upper bar, which is provided with an elongated slot, 39, as shown; or, if desired, the required aperture provided by the elongated slot may be obtained by two parallel narrow bars instead of the one wide one. A longitudinally-adjustable cross-barge, is provided with elongated tenons 5 at its ends, which are worked endwise in the mortises (3 in the posts when it is desired to move the drill, which it carries laterally over the face of the block or monument.

7 represents a box-screw, the foot-flange around which is perforated, and through said perforations 9 screw-bolts 10 are passed and into the said cross-bar, to which they firmly 5 secure it. A vertical screw-shaft, ll, passes through a perforation, 12, in the cross-bar 4 and engages within said box-screw, in which it is adjusted vertically by the hand-wheel 13, which is tight-keyed to it near its lower end. A cup, 1 f, with a globular or semi-globular socket, 15, is secured to the lower end of said screw-shaft, and the surmounting pressureball terminal 16 of the crank-brace 17 tits in said socket, making together a ball-andsocket boxing.

The ball may either be allowed to turn with said socket or the upper vertical arm of the brace may turn in a loose bearing within the ball.

The drill-bit 18, M

which is changeable from one size to another, may be firmly secured by any suitable means in its seat in the brace.

A series of bracketcleats, 19, are screw-lmlted or otherwise se cured to the insides of the posts of the frame, and an adjustable platform-bar, 20, is seated on the corresponding cleats on said posts that best accord with the length of the block or monument-spire to be drilled.

21 represents a monumentspire, the die 24 of which is in the course of being drilled to provide the socket-holes that seat the dowelpins which secure the monument to its base.

22 is the inverted pinnacle of the monument-spire, that rests in the conical socket 23 in the middle of the platform 20.

The monuwheels 31.

Swivel-boxes 32 are secured to nd have loose bearings on the ends of the clan p ng set-screws 30, and secured within said boxes and projecting therefrom are rubber cushions 33, which intervene between the swivel-boxes and the monument 2i, and so present a soft 5 clinging frictional surface which is immovable on the die-section of said monument, as the clamp-screw swivels or turns freely in the boxes,which, after the frictional clutch of the cushion on the marble, do not rotate.

Con- Ioo -\\"hen the clamp-frame is thus ereeter'l, it

elears the track for the placement of Theplatform 20 and the monument 24. or any marble or stonehloelc about to be drilled that is To be seated on The platform 20. The clampframe is Then unhooked and let down into its operative position, as shown in full lines in Figs. I and II, and the clamp seT-serews on the corresponding sides of the elai'np-T'rame are then screwed up to hold the monument or other object: seeurely while it is being operated on.

The drill is espeeially intended for use in marble-works for drilling dowel-holes 38 in. the die-sections, .L'e, of monuments, also in head-stone bases, &e., for dowel-pinning the seetions Together; but; it may also he advantageously used for other drilling purposes and for holding monuments, Tombstones, the, while in the eonrse ot' lettering, decorating, ((30.

It will be seen that The platform 20 is removable from the lnaeket-eleats at one height on The frame To any other To adapt the ad" justment: To the heightet the l)l0('l(. or menument to be operated on.

I claim as my invention 1. In a stone and marble drill, The frame in which The drill is hung, The hinged bifurcated clamp-frame, and adjustable elamping setserews arranged To hold the monument, &e., .in course of drilling, substant iall v as and for the purpose set forth.

some? 2. In a stone and marble drill, the main frame, the longitudinall v-adjustable bearerbar 4, the screw-boxing secured to said bar, the sereiwsha'ft that engages in said boxing and passes up through the elongated slot. in the cross-bar ot' the main frame above, the drill brave and hit, and the l)all-and-soeket connection of said brace with said screw-shaft, and hand -wheel that operates the shaft to adjust the elevation and depression of the drill, substantially as and for the purpose set forth.

3. In a stone and marble drill, the main frame, The braeket-eleats on said frame, and adjustable supporting-platlorm that rests on said cleats, the said platt'm'm provided with an inverted eonieal soeket in which the pinnacle of the monument, &e., rests while in the process of drilling, and the hinged elampframe and set-screws that hold the monument, &e., while being drilled, substantially as and for the purpose set forth.

4-. In a stone and marble drill, the main Frame, the adjustable eross-bar :t'roni whieh the drill is suspended, the supporting-plat form, the hinged bifurcated clamp-frame, the hooked a'tt'taehment To connect the main frame to The (lamp-frame when the latter is inoperative, the elamping set-screws that work inv the terminals of the bifurcated ends of the clamp-frame, and the swivel-boxes and their inelosed riil. ber cushions on the inner ends ot. the set-serews arranged To provide a frictionsurl'aee hearing not injurious to the Tate ol. the marble, substantiall v as and for the purpose set forth.

REUBEN A. MLIIENRY.

In presenee of- A. L. SCHULTZ, II. BUeKnAN. 

